Door-latch.



F. BECKER.

DOOR LATCH.

APPLICATION rmm NOV. 20, 1912.

1,071,862, ,Patented Sept. 2, 1913.

g I v I 5 I 5 5 l 5 lIIlI/Illl. 'llllIIIlIl/lllIl/llll FELIX 3120x113, or ARLON, BELGIUM.

, noon-Lemon.

Specification of Letters Patent.

Patented Sept. 2, 1913.

Application filed November 20,1912. Serial No. 732,408.

To all whom it may concern:

Be it known that I, FELIX BECKER, a subject of the King of Sweden, residing at Arlon, in the Kingdom of Belgium, have 5 invented a new and useful Door-Latch, of

which the following is a specification.

My invention relates to a latch for a door, which is to open to one side only. The latch is so constructed,that the door can be opened from both sides, but in such a manner, that the door-handle on one side must be pulled in the direction in which the door is to open and that the door-handle on the other side must be pushed inwardly. The doorlatch is further so constructed as to automatically withdraw a latch-bolt on the-door being opened and to cause the latch-bolt to engage in the slot in the door-post on the door being softly r lightly banged or turned back by means of a spring, whereby all disagreeableshocks or vibrations are avoided.

The chief feature of the new door-latch consists in that the latch-bolt is adapted to turn around one corner on the door being opened and to turn around the opposite corner on the door closing.

Another feature resides in the construction of the door-handles, which are made of a U-shaped cross section so as to provide great strength and to be guided by the casing.

I will now proceed to describe my invention with reference to the accompanying drawings, in which- Figure 1 is a horizontal section on an exaggerated scale through a door-and the two posts" and; an upper view of the doorlatch, Fig. 2 is an upper viewv on an enlarged ,scale of a slightly modified door- 40 latch, the cover of the casing being removed to show the interior of thecasing, only one of the two handles being partly shown and the other' omitted, Fig. 3 is a vertical section through the same on the line A-B in Fig. 2, seen in the direction of the arrows, Fig. 4 is a cross section through one door handle on the line CD in Fig. 2, seen in the direction of the arrows, Fig. 5 is a cross section through one guide 1* in the casing, 50 Fig. 6 shows on an enlarged scale apart of the guider in Fig. 2, and Fig. 7 shows a modified casing, the guides r and r being replaced by slots. j

' Similar letters of reference refer to simi- 55 lar parts throughout the several views.

As Fig. 1 shows, the door 0 hinged at 7' to one post N is to open only in the direction of the arrow Z, when either the handle 3 on one side of the door is pulled or the handle y on the other side is pushed. The doorlatch has a latch-bolt a normally engaging in the slot 2" of the catch-plate a provided on the other post M. When either 7 the handle y is pulled or the handle y is pushed, the latch-bolt 0 is to be thereby withdrawn from the catch-plate i in a manner to be described later 011.. When the door 0 is closed, either by softly banging it or by means of any known spring, the latchbolt 0 on striking the catch-plate i is to be thereby'depressed until it again engages in the slot i. Where so preferred, some ledge (not shown) may be provided on one edge of the post M (above the latch L in Fig. 1) for hunting the turn of the door as usual.

The two handles 12/, 3 are pivotally con-. nected together by means of a spindle n and two pins 2 e.

The door-latch L consists of a casing h a helical spring u so connected with the casing k as to be constantly pressed in one direction, so that normally a stop 70 (Fig. 2) provided on one handle g bears againstthe casing h, whereby the movement of the two handles 3 y in one direction is limited. In the other direction this movement may be limited by a stop similar to is provided on the other handle A shaft 0 mounted to turn in the casing k and the cover h has fastened on it a curved arm fand is surrounded with a helical spring 1), one end of which bears against the arm f and the other end against a pin 12 on the inside of the casing h. The spindle n has a tooth 8 adapted to slide on the inner curved face of the arm f. As the helical spring 1) is constantly strained, it will be understood, that thereby the arm f is in Fig. 2 pressed outward as shown in full lines, the tooth .9 servingasa stop.

Both the casing h and the cover h are on the inside provided with two oppositely curved uides r and 1" which are shown as chambers g g, see Fig. 6. A triangular latch-bolt c is provided, which is movable in a slot t (Fig. 3) of the casing 72. and may in the lower corner in Fig. 2 be made in one with two opposite pins d (omitted from Fig. 3 for the sake of clearness) of nearly rectangular cross section (Figs. 2 and 6).

The pins (Z are adapted to move through the two opposite guides 1" and to turn in the cylindrical chambers '9 her in Fig. 2 the latch-bolt 0 may be rigidly connected with a shaft b provided at the ends with two opposite thickenings b of nearly rectan lar section similar to d. These thickenings may be welded on. the shaft 5' or fastened in any other mann r. The are adapted to' move through the t o opposite guides 1' and to turn in the cylindrical chambers q. Evidently the two 'opposite guides r require-to. be concentric to the cylindrical chambers 'g and the two opposite guides r to be concentric to the cylindrical chambers g. The shaft 7) is pivotally connected with the above mentioned arm f by means of a rod'g, which has fastened on it a leaf spring e bearing against the imier side of the latch-bolt 0.

spring e tends to press the latch-bolt 0 out a The leaf ward from the casing h into the position shown in full lines in Fig. 2, the pins 02 hearing against the inside of the chambers q. The lower outer side of the latch-bolt c in Fig. 2 is shown as curved concentrically with the shaft 6. H 1

In Fig. 1 the twohandles y and y. are shown as turning on pins w w secured in suitable lugs w w on the casing k. In Fig. 2 the lower lug w is on the contrary shown as replaced by a widening h of the casing h. The" handle 4 is ma e of a U-shaped cross section shown in Fig. 4, so that the handle overlaps the upper and lower sides of the casing h and is thereby laterally guided. The upper and lower sides a of 'the handle 1 may widen so asto cfOIIIl twoopposite projections g 2) whereby Fig the handle is also gulded. bf course the v lows: When the handle 3 is pulled or-.the other, handle y is pushed, the spindle n will "i to a position (Fig. 2) indicated by-, v j dotted lines. Incons uence of thistherod other handle y omitted from Fig.2 may also be similarly constructed and the casing It may have a second widening (not shown) opposite and similar to vk "The' door-latchdescribed operates as. follongi'tudinally-imove and strain the helical spring u, while. its tooth a bearing against the arm f will turn the latter for example 9 moving into the position ,g? and pulling the shaft 6 will turn the latch-bolt 0 around (occupy the position j b outer side of the latch-bolt will occupy the.

thegtiins (2, so that the thickenings b on the s ha the guides '71 will b mWing/throu'gh'n Fig 2 and the In the upper col position 0. The pins cl turningin the cylin-' 'drical chambers 91, will be prevented by" the Walls of these chambers from moving through the guide 1". The leaf spring 6 will also help to prevent the pins d from mov; ing inward. Evidently in Fig. 2 thespindle n' will require to be shifted farther on for entirely Withdrawing the latch-bolt c from the catch-plate i' (Fig. 1) until the stop is of the other handle y strikes the casing h, when the door following the pull or push ,will open. On releasing the handle 3 or y the two springs u and 1) will return the movable parts into the initial position,

.so'that ,the latch-bolt a'will again project that it is very easy to close the door, as only the tension of the leaf spring 6 requires to be overcome.

Where so preferred, the guides 11 r may be replaced by slots r 7" (Fig. 7 provided in the bottom of the casing handin the cover 72/. r

1 The door-latch can be varied in many respects without departing from the spirit of my invention. I

I clalm:

'1. In a door latch, a spi'ing-influenc'd belt of substantially triangular shape and prov1ded with pivots at two of its corners,

about either of which pivots the bolt is adapted to oscillate, a pair of operatively connectedihandles, and a rod that permanently connects said handles with one of the.

bolt-pivots forretracting the bolt.

2. In a door latch, a spring-influenced bolt of substantially triangular shape and 'rovided with pivots at two ofits corners, a ut either of which pivots the bolt is ada ted to oscillate,.,a fixed curved guide provi ed for either pivot, means for temporarily locking either pivot to the end of its guide while a the other pivot moves along the other guide,

a pair of operatively connected handles, and

dles with one of the bolt-pivots for retracting the bolt.

-3... In a latch, a casing having in one side a slot, a triangular latch-bolt movable in the .a rod that permanently connects .said hanslot of said casing. and adapted to normally a project with one corner from said: casing,

two parallel pins secured in the two other corners of said. latch-bolt and having each I twoend approximately rectangular cross section, said casin having in each. of two parallel sides ad ommg the, slotted side two guides for severally guiding one rectangular.

' around the axes of the pins, means for yieldingly pressing said latch-bolt outward, and means for moving inward one of said pins and thus turning said latch-bolt around the other pin, whereby said latch-bolt is with drawn, said latch-bolt being constructed to be depressed into the casing from without for turning around the first of said two pins. 4.- In a latch, a casing having in one side a slot and two sides adjoining this slotted side parallel to the slot, a triangular latch-bolt movable 'in the slot of said casing and adapted to normally project with one corner from said casing, two parallelpins secured in the two other corners of said latch-bolt and having each two ends of approximately rectangular cross section, said casing having in each of the two parallel sides two guides for severally guiding one rectangular end of said two pins which guides are curved concentrically with the opposite pins and widen into cylindrical chambers for ermitting the rectangular ends to severa y turn around the axes of the pins, a shaft parallel to said two vpins mounted to turn in said casing, an arm fast on said shaft, a rod for connecting said arm with one of said two pins, a first spring on s id rod for yieldingly pressing said latcholt outward, a second spring tending to' turn said arm into a line with said rod, and a spindle longitudinally guided in said casing parallel to its slot and having a tooth in contact with said arm and adapted to turn the latter against the strain of said second spring, said spindle being adapted to be shifted from without in one direction for moving inward by means of said arm and said rod the pin connected with this red, whereby said latch-bolt is turned around the other pin and thus withdrawn, and said latch-bolt being adapted to be depressed from without while turning around the first pin.

5. In a latch, a casing having a shaft, a handle of a U-shaped cross sectlon turnable on said shaft and adapted to overlap said casing, whereby it is guided, a spindle longitudinally guided in said casing and pivotally connected with said handle, and a spring tending to move said. spindle and thereby said handle into a normal position.

FELIX BECKER. Witnesses:

ALPHONSE MUNGHEN, CHARLES FOURNELLE. 

